import java.util.List;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 98152
 * Date: 2025-03-07
 * Time: 0:25
 */
public class Test2 {
    public static void main(String[] args) {
        Solution2 solution2 = new Solution2();
        String s = "a1b2";
        List<String> list = solution2.letterCasePermutation(s);
    }
}
